package com.hmdp.utils;

import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

/**
 * ClassName: RedisIdWorker
 * Package: com.hmdp.utils
 * Description:
 *
 * @Author dhu-bion
 * @Create 2025/8/15 15:48
 * @Version 1.0
 */

@Component
public class RedisIdWorker {

    private static final long BEGIN_TIMESTAMP = 1735689600L;
    private static final int COUNT_BITS = 32;

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    public long nextId(String keyPrefix){

        //1.生成时间戳
        long nowSecond = LocalDateTime.now().toEpochSecond(ZoneOffset.UTC);
        long timestamp = nowSecond - BEGIN_TIMESTAMP;

        //2.生成序列号
        String date = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy:MM:dd"));
        long count = stringRedisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + date);

        //3.拼接 返回
        return timestamp << COUNT_BITS | count;

    }

//    public static void main(String[] args){
//        LocalDateTime time = LocalDateTime.of(2025, 1, 1, 0, 0, 0);
//        long l = time.toEpochSecond(ZoneOffset.UTC);
//        System.out.println(l);
//    }



}
